Adaptive F2P Guide 2.0

I just finished my 7* phoenix with everyone at G8 and level 70. Pondering hard on what to do next. I have 6* G8 Tarkin, 6* EP, 5* Thrawn, 5* Boba and 4* Vader. I'm guessing that's too weak to work up to an empire arena team?

4* Biggs, 3* STH, 4* Lando. Pretty weak there too. I'm a clean slate for the midgame! lol.

What do you guys recommend for the next transition? Traditional Rex?

https://swgoh.gg/u/zhpkiller/